40000040085 has 16 divisors (see below), whose sum is σ = 64009892160. Its totient is φ = 21330078720.

The previous prime is 40000040077. The next prime is 40000040089. The reversal of 40000040085 is 58004000004.

It is not a de Polignac number, because 40000040085 - 2³ = 40000040077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40000040089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102156 + ... + 300725.

It is an arithmetic number, because the mean of its divisors is an integer number (4000618260).

Almost surely, 2^40000040085 is an apocalyptic number.

It is an amenable number.

40000040085 is a deficient number, since it is larger than the sum of its proper divisors (24009852075).

40000040085 is a wasteful number, since it uses less digits than its factorization.

40000040085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409508.

The product of its (nonzero) digits is 640, while the sum is 21.

Adding to 40000040085 its reverse (58004000004), we get a palindrome (98004040089).

The spelling of 40000040085 in words is "forty billion, forty thousand, eighty-five".